DDA144EU-7 Equivalent & Substitute Parts

Part Overview

The DDA144EU-7 is a pre-biased dual PNP bipolar transistor (BJT) manufactured by Diodes Incorporated in a surface mount SOT-363 package. This component integrates two PNP transistors with internal base bias resistors, designed for switching and amplification applications requiring 50V collector-emitter breakdown voltage and 100mA maximum collector current.

The DDA144EU-7 is discontinued at DiGi Electronics. Equivalent and substitute parts are available from multiple manufacturers including onsemi, Rohm Semiconductor, Toshiba Semiconductor, and NXP Semiconductors. These alternatives maintain electrical compatibility while offering different packaging options, power ratings, and compliance certifications.

Key Parameters

Parameter	DDA144EU-7 Value	Unit	Substitution Relevance
Transistor Type	2 PNP - Pre-Biased (Dual)	—	Critical - Must match
Current - Collector (Ic) Max	100	mA	Critical - Must match or exceed
Voltage - Collector Emitter Breakdown (Max)	50	V	Critical - Must match or exceed
Resistor - Base (R1)	47	kOhms	Critical - Must match
Resistor - Emitter Base (R2)	47	kOhms	Critical - Must match
DC Current Gain (hFE) Min @ Ic, Vce	68 @ 5mA, 5V	—	Important - Affects circuit performance
Vce Saturation (Max) @ Ib, Ic	300 @ 500µA, 10mA	mV	Important - Affects switching characteristics
Current - Collector Cutoff (Max)	500	nA	Important - Affects leakage performance
Frequency - Transition	250	MHz	Important - Affects speed capability
Power - Max	200	mW	Important - Thermal design consideration
Package / Case	6-TSSOP, SC-88, SOT-363	—	Critical - PCB layout compatibility
Mounting Type	Surface Mount	—	Critical - Assembly process compatibility
RoHS Status	RoHS non-compliant	—	Important - Regulatory compliance
Moisture Sensitivity Level (MSL)	1 (Unlimited)	—	Important - Storage and handling

Substitute Part Grouping Explanation

Substitution of the DDA144EU-7 is determined by strict electrical and mechanical parameter matching. All substitute parts must satisfy the following criteria:

Critical Matching Parameters:

Transistor configuration: Dual PNP pre-biased
Maximum collector current: 100mA minimum
Collector-emitter breakdown voltage: 50V minimum
Internal base resistor (R1): 47kOhms
Internal emitter-base resistor (R2): 47kOhms
Surface mount package compatibility: SOT-363, SC-88, or SC-88/SC70-6 equivalent

Important Performance Parameters:

DC current gain (hFE): Minimum 68 at specified test conditions
Saturation voltage (Vce): Maximum 300mV at specified conditions
Collector cutoff current: Maximum 500nA
Transition frequency: 250MHz or higher preferred
Power dissipation: 200mW or higher capacity

Compliance and Packaging:

RoHS compliance status (RoHS3 preferred for new designs)
Moisture sensitivity level: MSL 1 (Unlimited)
Packaging format: Tape & Reel (TR), Cut Tape (CT), or Bulk

Substitute parts are grouped by their ability to meet these parameters while offering improved availability, compliance certifications, or alternative packaging options.

Parameter Comparison

Parameter	DDA144EU-7	DDA144EU-7-F	MUN5113DW1T1G	UMB2NTN	NSVMUN5113DW1T3G	PUMB2,115	RN2904,LF(CT	SMUN5113DW1T1G
Manufacturer	Diodes Inc.	Diodes Inc.	onsemi	Rohm Semi.	onsemi	NXP Semi.	Toshiba Semi.	onsemi
Transistor Type	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased	2 PNP Pre-Biased
Ic (Max)	100mA	100mA	100mA	100mA	100mA	100mA	100mA	100mA
Vce Breakdown (Max)	50V	50V	50V	50V	50V	50V	50V	50V
R1 (Base)	47kOhms	47kOhms	47kOhm	47kOhms	47kOhms	47kOhms	47kOhms	47kOhms
R2 (Emitter-Base)	47kOhms	47kOhms	47kOhm	47kOhms	47kOhms	47kOhms	47kOhms	47kOhms
hFE (Min) @ Ic, Vce	68 @ 5mA, 5V	68 @ 5mA, 5V	80 @ 5mA, 10V	68 @ 5mA, 5V	80 @ 5mA, 1V	80 @ 5mA, 5V	80 @ 10mA, 5V	80 @ 5mA, 10V
Vce Sat (Max) @ Ib, Ic	300mV @ 500µA, 10mA	300mV @ 500µA, 10mA	250mV @ 300µA, 10mA	300mV @ 500µA, 10mA	250mV @ 300µA, 10mA	150mV @ 500µA, 10mA	300mV @ 250µA, 5mA	250mV @ 300µA, 10mA
Ic Cutoff (Max)	500nA	500nA	500nA	500nA	500nA	1µA	500nA	500nA
Frequency - Transition	250MHz	250MHz	—	250MHz	—	—	200MHz	—
Power - Max	200mW	200mW	187mW	150mW	250mW	300mW	200mW	187mW
Package	SOT-363	SOT-363	SC-88/SC70-6/SOT-363	UMT6	SC-88/SC70-6/SOT-363	6-TSSOP	US6	SC-88/SC70-6/SOT-363
RoHS Status	Non-compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
Product Status	Discontinued	Active	Active	Active	Active	Active	Active	Active
Inventory Availability	732 Pcs	3120 Pcs	4400 Pcs	5950 Pcs	688 Pcs	146920 Pcs	3879 Pcs	83300 Pcs

Engineering Selection Recommendations

Direct Equivalent - Same Packaging:

DDA144EU-7-F is the direct equivalent from Diodes Incorporated, maintaining identical electrical specifications and SOT-363 packaging. This part is active and RoHS3 compliant, addressing the regulatory limitation of the discontinued DDA144EU-7. Selection of DDA144EU-7-F requires no circuit redesign and provides the most straightforward replacement path.

Electrical Equivalents - Alternative Manufacturers:

MUN5113DW1T1G (onsemi), NSVMUN5113DW1T3G (onsemi), and SMUN5113DW1T1G (onsemi) meet all critical electrical parameters with SC-88/SC70-6/SOT-363 package compatibility. These parts are active, RoHS3 compliant, and available in high quantities. Minor variations in hFE and saturation voltage are within acceptable ranges for most applications.

RN2904,LF(CT (Toshiba Semiconductor) provides electrical equivalence with US6 packaging. This part maintains 200MHz transition frequency and 200mW power rating, matching the original DDA144EU-7 specifications. RoHS3 compliance and active product status support long-term availability.

UMB2NTN (Rohm Semiconductor) offers electrical equivalence with UMT6 packaging. This part maintains 250MHz transition frequency and identical bias resistor values. The 150mW power rating is lower than the original, requiring thermal design verification for high-power applications.

Enhanced Performance Option:

PUMB2,115 (NXP Semiconductors) provides superior electrical characteristics with 300mW power rating, lower saturation voltage (150mV), and AEC-Q100 automotive qualification. This part is available in high volume (146920 Pcs) and offers the best long-term supply security. The 6-TSSOP package requires PCB layout verification for compatibility with SOT-363 footprints.

Compliance Consideration:

All substitute parts except the original DDA144EU-7 are RoHS3 compliant. For applications requiring RoHS compliance, any substitute part listed is acceptable. The original DDA144EU-7 (RoHS non-compliant) should be replaced with an active, compliant alternative for new designs or long-term production.

Frequently Asked Questions (FAQ)

Q: Can I use DDA144EU-7-F as a direct replacement for DDA144EU-7?

A: Yes. DDA144EU-7-F is the direct equivalent from Diodes Incorporated with identical electrical specifications, internal bias resistor values, and SOT-363 packaging. The primary difference is product status (active vs. discontinued) and RoHS compliance (ROHS3 vs. non-compliant). No circuit modifications are required.

Q: What are the key parameters that determine substitution compatibility?

A: Substitution compatibility is determined by: (1) Dual PNP pre-biased transistor configuration, (2) 100mA maximum collector current, (3) 50V collector-emitter breakdown voltage, (4) 47kOhms internal base resistor (R1), (5) 47kOhms internal emitter-base resistor (R2), and (6) Surface mount package compatibility (SOT-363, SC-88, or equivalent). All listed substitute parts meet these criteria.

Q: Are there package compatibility issues between SOT-363, SC-88, and UMT6?

A: SOT-363 and SC-88 are equivalent package designations for the same 6-pin surface mount form factor. Parts specified as SC-88/SC70-6/SOT-363 are directly compatible with SOT-363 PCB footprints. UMT6 (Rohm Semiconductor) is a different package form factor and requires PCB layout verification. US6 (Toshiba Semiconductor) is also a distinct package requiring footprint compatibility assessment.

Q: What is the difference between the onsemi MUN5113 variants?

A: MUN5113DW1T1G, NSVMUN5113DW1T3G, and SMUN5113DW1T1G are onsemi pre-biased dual PNP transistors with identical electrical specifications and SC-88/SC70-6/SOT-363 packaging. Differences include power rating (187mW vs. 250mW), hFE test conditions, and saturation voltage specifications. All are electrically compatible with the DDA144EU-7.

Q: Why does PUMB2,115 have lower saturation voltage than the original part?

A: PUMB2,115 (NXP Semiconductors) achieves 150mV saturation voltage compared to 300mV for the DDA144EU-7 through optimized transistor design. This represents improved switching performance and lower power dissipation during saturation. The lower saturation voltage is beneficial for most applications and does not create compatibility issues.

Q: Is RoHS3 compliance required for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. All substitute parts listed except the original DDA144EU-7 are RoHS3 compliant. For new designs or continued production, selection of a RoHS3 compliant part is recommended to ensure regulatory compliance and long-term supply availability.

Q: Which substitute part offers the best long-term availability?

A: PUMB2,115 (NXP Semiconductors) offers the highest inventory availability at 146920 Pcs, combined with active product status and AEC-Q100 automotive qualification. SMUN5113DW1T1G (onsemi) provides the second-best availability at 83300 Pcs. Both parts support long-term production requirements.

Q: Can I use UMB2NTN if my application requires 200mW power dissipation?

A: UMB2NTN has a maximum power rating of 150mW, which is lower than the original DDA144EU-7 (200mW). For applications requiring sustained 200mW power dissipation, alternative parts with higher power ratings (DDA144EU-7-F at 200mW, NSVMUN5113DW1T3G at 250mW, or PUMB2,115 at 300mW) are recommended. Thermal design verification is required for high-power applications.

Q: What is the transition frequency difference between parts?

A: The original DDA144EU-7 specifies 250MHz transition frequency. RN2904,LF(CT specifies 200MHz. Other substitute parts do not specify transition frequency in their datasheets. For applications requiring maximum switching speed, DDA144EU-7-F or UMB2NTN (both 250MHz) are preferred. The 200MHz specification of RN2904,LF(CT is acceptable for most general-purpose switching applications.

Q: Are all substitute parts available in Tape & Reel packaging?

A: Most substitute parts are available in Tape & Reel (TR) or Cut Tape (CT) packaging suitable for automated assembly. PUMB2,115 is specified as Bulk packaging. Verify packaging format with your supplier to ensure compatibility with your assembly process requirements.

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